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image.php
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<?php
//
// ZoneMinder web image view file, $Date: 2008-09-29 14:15:13 +0100 (Mon, 29 Sep 2008) $, $Revision: 2640 $
// Copyright (C) 2001-2008 Philip Coombes
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// Calling sequence: ... /zm/index.php?view=image&path=/monid/path/image.jpg&scale=nnn&width=wwww&height=hhhhh
//
// Path is physical path to the image starting at the monitor id
//
// Scale is optional and between 1 and 400 (percent),
// Omitted or 100 = no scaling done, image passed through directly
// Scaling will increase response time slightly
//
// width and height are each optional, ideally supply both, but if only one is supplied the other is calculated
// These are in pixels
//
// If both scale and either width or height are specified, scale is ignored
//
if ( !canView('Events') and ($_REQUEST['fid'] != 'snapshot' or !canView('Snapshots'))) {
$view = 'error';
return;
}
require_once('includes/Event.php');
require_once('includes/Frame.php');
// Compatibility for PHP 5.4
if ( !function_exists('imagescale') ) {
function imagescale($image, $new_width, $new_height = -1, $mode = 0) {
$mode; // Not supported
$new_height = ($new_height == -1) ? imagesy($image) : $new_height;
$imageNew = imagecreatetruecolor($new_width, $new_height);
imagecopyresampled($imageNew, $image, 0, 0, 0, 0, (int)$new_width, (int)$new_height, imagesx($image), imagesy($image));
return $imageNew;
}
}
if (!empty($_REQUEST['proxy'])) {
$url = $_REQUEST['proxy'];
if (!$url) {
ZM\Warning('No url passed to image proxy');
return;
}
$url_parts = parse_url($url);
$username = $url_parts['user'];
$password = isset($url_parts['pass']) ? $url_parts['pass'] : '';
$method = 'GET';
// preparing http options:
$opts = array(
'http'=>array(
'method'=>$method,
#'header'=>"Accept-language: en\r\n" .
'ignore_errors' => true
#"Cookie: foo=bar\r\n"
),
'ssl'=>array(
"verify_peer"=>false,
"verify_peer_name"=>false,
)
);
$context = stream_context_create($opts);
// set no time limit and disable compression:
set_time_limit(5);
if (function_exists('apache_setenv')) @apache_setenv('no-gzip', 1);
@ini_set('zlib.output_compression', 0);
/* Sends an http request with additional headers shown above */
$fp = @fopen($url, 'r', false, $context);
if ($fp) {
$meta_data = stream_get_meta_data($fp);
ZM\Debug(print_r($meta_data, true));
foreach ($meta_data['wrapper_data'] as $header) {
preg_match('/WWW-Authenticate: Digest (.*)/i', $header, $matches);
$nc = 1;
if (!empty($matches)) {
ZM\Debug("Matched $header");
$auth_header = $matches[1];
$auth_header_array = explode(',', $auth_header);
$parsed = array();
foreach ($auth_header_array as $pair) {
preg_match('/^\s*(\w+)="?(.+)"?\s*$/', $pair, $vals);
if (!empty($vals)) {
$parsed[$vals[1]] = trim($vals[2], '"');
} else {
ZM\Debug("Didn't match preg $pair");
}
}
ZM\Debug(print_r($parsed, true));
$cnonce = uniqid();
$response_realm = (isset($parsed['realm'])) ? $parsed['realm'] : '';
$response_nonce = (isset($parsed['nonce'])) ? $parsed['nonce'] : '';
$response_opaque = (isset($parsed['opaque'])) ? $parsed['opaque'] : '';
$authenticate1 = md5($username.':'.$response_realm.':'.$password);
$authenticate2 = md5($method.':'.$url);
$digestData = $authenticate1.':'.$response_nonce;
if (!empty($parsed['qop'])) {
$digestData .= ':' . sprintf('%08x', $nc) . ':' . $cnonce . ':' . $parsed['qop'];
}
$authenticate_response = md5($digestData.':'.$authenticate2);
$request = sprintf('Authorization: Digest username="%s", realm="%s", nonce="%s", uri="%s", response="%s"',
$username, $response_realm, $response_nonce, $url, $authenticate_response);
if (!empty($parsed['opaque'])) $request .= ', opaque="'.$parsed['opaque'].'"';
if (!empty($parsed['qop'])) {
$request .= ', qop="'.$parsed['qop'].'"';
$request .= ', nc="'.sprintf('%08x', $nc).'"';
$nc++;
$request .= ', cnonce="'.$cnonce.'"';
}
$request .= ', algorithm="MD5"';
ZM\Debug($request);
$request_header = array($request);
$opts['http']['header'] = $request;
$context = stream_context_create($opts);
$fp = fopen($url, 'r', false, $context);
$meta_data = stream_get_meta_data($fp);
ZM\Debug(print_r($meta_data, true));
} # end if have auth
} # end foreach header
# Read in until we either stop reading or have a second Content-Length
$r = '';
while (substr_count($r, 'Content-Length') != 2) {
$new = fread($fp, 512);
if (!$new) break;
$r .= $new;
}
#ZM\Debug($r);
$start = strpos($r, "\xff");
if (false !== $start) {
header('Content-type: image/jpeg');
$end = strpos($r, "--\n", $start)-1;
if ($end > $start) {
$frame = substr($r, $start, $end - $start);
ZM\Debug("Start $start end $end");
if (imagecreatefromstring($frame)) {
echo $frame;
}
} else {
# This is possibly an XSS but I don't see how to get around it other than actually trying to parse it as a valid image first.
# So we only output it if imagecreatefromdata succeeds
if (imagecreatefromstring($r)) {
echo $r;
}
}
} else {
$img = imagecreate(320, 240);
$textbgcolor = imagecolorallocate($img, 0, 0, 0);
$textcolor = imagecolorallocate($img, 255, 255, 255);
imagestring($img, 5, 5, 5, 'Authentication Failed', $textcolor);
header('Content-type: image/jpeg');
imagejpeg($img);
}
fclose($fp);
} else {
ZM\Debug("Failed to open $url");
$img = imagecreate(320, 200);
$textbgcolor = imagecolorallocate($img, 0, 0, 0);
$textcolor = imagecolorallocate($img, 255, 255, 255);
imagestring($img, 5, 5, 5, 'Failed to open', $textcolor);
header('Content-type: image/jpeg');
imagejpeg($img);
}
return;
}
$errorText = false;
$filename = '';
$Frame = null;
$Event = null;
$path = null;
$media_type='image/jpeg';
if ( empty($_REQUEST['path']) ) {
$show = empty($_REQUEST['show']) ? 'capture' : $_REQUEST['show'];
if ( empty($_REQUEST['fid']) ) {
header('HTTP/1.0 404 Not Found');
ZM\Error('No Frame ID specified');
return;
}
if ( !empty($_REQUEST['eid']) ) {
$Event = ZM\Event::find_one(array('Id'=>$_REQUEST['eid']));
if ( !$Event ) {
header('HTTP/1.0 404 Not Found');
ZM\Error('Event '.$_REQUEST['eid'].' Not found');
return;
}
if ( $_REQUEST['fid'] == 'objdetect' ) {
// if animation file is found, return that, else return image
// we are only looking for GIF or jpg here, not mp4
// as most often, browsers asking for this link will be expecting
// media types that can be rendered as <img src=>
$path_anim_gif = $Event->Path().'/objdetect.gif';
$path_image = $Event->Path().'/objdetect.jpg';
if (file_exists($path_anim_gif)) {
// we found the animation gif file
$media_type = 'image/gif';
ZM\Debug("Animation file found at $path");
$path = $path_anim_gif;
} else if (file_exists($path_image)) {
// animation not found, but image found
ZM\Debug("Image file found at $path");
$path = $path_image;
} else {
// neither animation nor image found
header('HTTP/1.0 404 Not Found');
ZM\Error('Object detection animation and image not found for this event');
return;
}
$Frame = new ZM\Frame();
$Frame->Id('objdetect');
} else if ( $_REQUEST['fid'] == 'objdetect_mp4' ) {
$path = $Event->Path().'/objdetect.mp4';
if ( !file_exists($path) ) {
header('HTTP/1.0 404 Not Found');
ZM\Error("File $path does not exist. You might not have enabled create_animation in objectconfig.ini. If you have, inspect debug logs for errors during creation");
return;
}
$Frame = new ZM\Frame();
$Frame->Id('objdetect');
$media_type = 'video/mp4';
} else if ( $_REQUEST['fid'] == 'objdetect_gif' ) {
$path = $Event->Path().'/objdetect.gif';
if ( !file_exists($path) ) {
header('HTTP/1.0 404 Not Found');
ZM\Error("File $path does not exist. You might not have enabled create_animation in objectconfig.ini. If you have, inspect debug logs for errors during creation");
return;
}
$Frame = new ZM\Frame();
$Frame->Id('objdetect');
$media_type = 'image/gif';
} else if ( $_REQUEST['fid'] == 'objdetect_jpg' ) {
$path = $Event->Path().'/objdetect.jpg';
if ( !file_exists($path) ) {
header('HTTP/1.0 404 Not Found');
ZM\Error("File $path does not exist. Please make sure store_frame_in_zm is enabled in the object detection config");
return;
}
$Frame = new ZM\Frame();
$Frame->Id('objdetect');
} else if ( $_REQUEST['fid'] == 'alarm' ) {
$path = $Event->Path().'/alarm.jpg';
if ( !file_exists($path) ) {
# legacy support
# look for first alarmed frame
$Frame = ZM\Frame::find_one(
array('EventId'=>$_REQUEST['eid'], 'Type'=>'Alarm'),
array('order'=>'FrameId ASC'));
if ( !$Frame ) { # no alarms, get first one I find
$Frame = ZM\Frame::find_one(array('EventId'=>$_REQUEST['eid']));
if ( !$Frame ) {
ZM\Warning('No frame found for event '.$_REQUEST['eid']);
$Frame = new ZM\Frame();
$Frame->Delta(1);
$Frame->FrameId(1);
}
}
if ( $Event->SaveJPEGs() & 1 ) {
# If we store Frames as jpgs, then we don't store an alarmed snapshot
$path = $Event->Path().'/'.sprintf('%0'.ZM_EVENT_IMAGE_DIGITS.'d', $Frame->FrameId()).'-'.$show.'.jpg';
} else {
header('HTTP/1.0 404 Not Found');
ZM\Debug('No alarm jpg found for event '.$_REQUEST['eid'].' at '.$path);
return;
}
} else {
$Frame = new ZM\Frame();
$Frame->Delta(1);
$Frame->FrameId('alarm');
} # alarm.jpg found
} else if ( $_REQUEST['fid'] == 'snapshot' ) {
$path = $Event->Path().'/snapshot.jpg';
if ( !file_exists($path) ) {
$Frame = ZM\Frame::find_one(array('EventId'=>$_REQUEST['eid'], 'Score'=>$Event->MaxScore()));
if ( !$Frame )
$Frame = ZM\Frame::find_one(array('EventId'=>$_REQUEST['eid']));
if ( !$Frame ) {
ZM\Warning('No frame found for event ' . $_REQUEST['eid']);
$Frame = new ZM\Frame();
$Frame->Delta(1);
if ( $Event->SaveJPEGs() & 1 ) {
$Frame->FrameId(0);
} else {
$Frame->FrameId('snapshot');
}
}
if ( $Event->SaveJPEGs() & 1 ) {
# If we store Frames as jpgs, then we don't store a snapshot
$path = $Event->Path().'/'.sprintf('%0'.ZM_EVENT_IMAGE_DIGITS.'d', $Frame->FrameId()).'-'.$show.'.jpg';
} else {
if ( $Event->DefaultVideo() ) {
$file_path = $Event->Path().'/'.$Event->DefaultVideo();
if (!file_exists($file_path)) {
if ($file = find_video($Event->Path())) {
$file_path = $Event->Path().'/'.$file;
}
}
if (file_exists($file_path)) {
$command = ZM_PATH_FFMPEG.' -ss '. $Frame->Delta() .' -i '.$file_path.' -frames:v 1 '.$path . ' 2>&1';
#$command ='ffmpeg -ss '. $Frame->Delta() .' -i '.$Event->Path().'/'.$Event->DefaultVideo().' -vf "select=gte(n\\,'.$Frame->FrameId().'),setpts=PTS-STARTPTS" '.$path;
#$command ='ffmpeg -v 0 -i '.$Storage->Path().'/'.$Event->Path().'/'.$Event->DefaultVideo().' -vf "select=gte(n\\,'.$Frame->FrameId().'),setpts=PTS-STARTPTS" '.$path;
ZM\Debug("Running $command");
$output = array();
$retval = 0;
exec($command, $output, $retval);
ZM\Debug("Command: $command, retval: $retval, output: " . implode("\n", $output));
if ( ! file_exists($path) ) {
header('HTTP/1.0 404 Not Found');
ZM\Error('Can\'t create frame images from video for this event '.$Event->DefaultVideo().'
Command was: '.$command.'
Output was: '.implode(PHP_EOL,$output) );
return;
}
# Generating an image file will use up more disk space, so update the Event record.
if ( $Event->EndDateTime() ) {
$Event->DiskSpace(null);
}
} else {
header('HTTP/1.0 404 Not Found');
ZM\Error('Can\'t create frame images from missing video file at '.$Event->DefaultVideo());
}
} else {
header('HTTP/1.0 404 Not Found');
ZM\Error('No snapshot jpg found for event '.$_REQUEST['eid']);
return;
}
} # end if stored jpgs
} else {
$Frame = new ZM\Frame();
$Frame->Delta(1);
$Frame->FrameId('snapshot');
} # end if found snapshot.jpg
} else {
$Frame = ZM\Frame::find_one(array('EventId'=>$_REQUEST['eid'], 'FrameId'=>$_REQUEST['fid']));
if (!$Frame) {
$Frame = $Event->find_virtual_frame($_REQUEST['fid']);
if (!$Frame) {
header('HTTP/1.0 404 Not Found');
ZM\Error('No Frame found for event('.$_REQUEST['eid'].') and frame id('.$_REQUEST['fid'].')');
return;
}
} # end if !Frame
// Frame can be non-existent. We have Bulk frames. So now we should try to load the bulk frame
$path = $Event->Path().'/'.sprintf('%0'.ZM_EVENT_IMAGE_DIGITS.'d',$Frame->FrameId()).'-'.$show.'.jpg';
} # if special frame (snapshot, alarm etc) or identified by id
} else {
# If we are only specifying fid, then the fid must be the primary key into the frames table. But when the event is specified, then it is the frame #
$Frame = ZM\Frame::find_one(array('Id'=>$_REQUEST['fid']));
if ( !$Frame ) {
header('HTTP/1.0 404 Not Found');
ZM\Error('Frame ' . $_REQUEST['fid'] . ' Not Found');
return;
}
$Event = ZM\Event::find_one(array('Id'=>$Frame->EventId()));
if ( !$Event ) {
header('HTTP/1.0 404 Not Found');
ZM\Error('Event ' . $Frame->EventId() . ' Not Found');
return;
}
$path = $Event->Path().'/'.sprintf('%0'.ZM_EVENT_IMAGE_DIGITS.'d',$Frame->FrameId()).'-'.$show.'.jpg';
} # end if have eid
if ( !file_exists($path) ) {
ZM\Debug("$path does not exist");
# Generate the frame JPG
if ( ($show == 'capture') and $Event->DefaultVideo() ) {
$file_path = $Event->Path().'/'.$Event->DefaultVideo();
if (!file_exists($file_path)) {
if ($file = find_video($Event->Path())) {
$file_path = $Event->Path().'/'.$file;
}
}
if (!file_exists($file_path)) {
header('HTTP/1.0 404 Not Found');
ZM\Error("Can't create frame images from video because there is no video file for this event at (".$Event->Path().'/'.$Event->DefaultVideo() );
return;
}
$command = ZM_PATH_FFMPEG.' -ss '. $Frame->Delta() .' -i '.$file_path.' -frames:v 1 '.$path . ' 2>&1';
#$command ='ffmpeg -ss '. $Frame->Delta() .' -i '.$Event->Path().'/'.$Event->DefaultVideo().' -vf "select=gte(n\\,'.$Frame->FrameId().'),setpts=PTS-STARTPTS" '.$path;
#$command ='ffmpeg -v 0 -i '.$Storage->Path().'/'.$Event->Path().'/'.$Event->DefaultVideo().' -vf "select=gte(n\\,'.$Frame->FrameId().'),setpts=PTS-STARTPTS" '.$path;
ZM\Debug("Running $command");
$output = array();
$retval = 0;
exec($command, $output, $retval);
ZM\Debug("Command: $command, retval: $retval, output: " . implode("\n", $output));
if ( ! file_exists($path) ) {
header('HTTP/1.0 404 Not Found');
ZM\Error('Can\'t create frame images from video for this event '.$Event->DefaultVideo().'
Command was: '.$command.'
Output was: '.implode(PHP_EOL,$output) );
return;
}
# Generating an image file will use up more disk space, so update the Event record.
if ( $Event->EndDateTime() ) {
$Event->DiskSpace(null);
}
} else {
header('HTTP/1.0 404 Not Found');
ZM\Error("Can't create frame $show images from video because there is no video file for this event at ".
$Event->Path().'/'.$Event->DefaultVideo() );
return;
}
} # end if ! file_exists($path)
}
# we now load the actual image to send
$scale = 0;
if ( !empty($_REQUEST['scale']) ) {
if ( is_numeric($_REQUEST['scale']) ) {
$x = $_REQUEST['scale'];
if ( $x >= 1 and $x <= 400 )
$scale = $x;
}
}
$width = 0;
if ( !empty($_REQUEST['width']) ) {
if ( is_numeric($_REQUEST['width']) ) {
$x = $_REQUEST['width'];
if ( $x >= 10 and $x <= 8000 )
$width = $x;
}
}
$height = 0;
if ( !empty($_REQUEST['height']) ) {
if ( is_numeric($_REQUEST['height']) ) {
$x = $_REQUEST['height'];
if ( $x >= 10 and $x <= 8000 )
$height = $x;
}
}
if ( $errorText ) {
ZM\Error($errorText);
} else {
# Must lock it because zmc may be still writing the jpg and will have a lock on it.
$fp_path = fopen($path, 'r');
$lock = flock($fp_path, LOCK_SH);
if (!$lock) ZM\Warning("Unable to get a read lock on $path, continuing.");
header('Content-type: '.$media_type);
header('Cache-Control: max-age=86400');
header('Expires: '.gmdate('D, d M Y H:i:s \G\M\T', time() + (60 * 60))); // Default set to 1 hour
header('Pragma: cache');
if (($scale==0 || $scale==100) && ($width==0) && ($height==0)) {
# This is so that Save Image As give a useful filename
if ($Event) {
$filename = $Event->MonitorId().'_'.$Event->Id().'_'.$Frame->FrameId().'.jpg';
header('Content-Disposition: inline; filename="' . $filename . '"');
}
if (!readfile($path)) {
ZM\Error('No bytes read from '. $path);
}
} else {
ZM\Debug("Doing a scaled image: scale($scale) width($width) height($height)");
$i = null;
if ( ! ( $width && $height ) ) {
$i = imagecreatefromjpeg($path);
$oldWidth = imagesx($i);
$oldHeight = imagesy($i);
if ( $width == 0 && $height == 0 ) { // scale has to be set to get here with both zero
$width = intval($oldWidth * $scale / 100.0);
$height= intval($oldHeight * $scale / 100.0);
} elseif ( $width == 0 && $height != 0 ) {
$width = intval(($height * $oldWidth) / $oldHeight);
} elseif ( $width != 0 && $height == 0 ) {
$height = intval(($width * $oldHeight) / $oldWidth);
ZM\Debug("Figuring out height using width: $height = ($width * $oldHeight) / $oldWidth");
}
if ( $width == $oldWidth && $height == $oldHeight ) {
ZM\Warning('No change to width despite scaling.');
}
}
# Slight optimisation, thumbnails always specify width and height, so we can cache them.
$scaled_path = preg_replace('/\.jpg$/', "-${width}x${height}.jpg", $path);
if ($Event) {
$filename = $Event->MonitorId().'_'.$Event->Id().'_'.$Frame->FrameId()."-${width}x${height}.jpg";
header('Content-Disposition: inline; filename="' . $filename . '"');
}
if (!file_exists($scaled_path)) {
ZM\Debug("Cached scaled image does not exist at $scaled_path. Creating it");
if (!$i) {
$i = imagecreatefromjpeg($path);
}
if (!$i) {
ZM\Error('Unable to load jpeg from '.$scaled_path);
$i = imagecreatetruecolor($width, $height);
$bg_colour = imagecolorallocate($i, 255, 255, 255);
$fg_colour = imagecolorallocate($i, 0, 0, 0);
imagefilledrectangle($i, 0, 0, $width, $height, $bg_colour);
imagestring($i, 1, 5, 5, 'Unable to load jpeg from ' . $scaled_path, $fg_colour);
imagejpeg($i);
} else {
ZM\Debug("Have image scaling to $width x $height");
ob_start();
$iScale = imagescale($i, $width, $height);
imagejpeg($iScale);
imagedestroy($i);
imagedestroy($iScale);
$scaled_jpeg_data = ob_get_contents();
file_put_contents($scaled_path, $scaled_jpeg_data, LOCK_EX);
echo $scaled_jpeg_data;
}
} else {
$fp_scaled_path = fopen($scaled_path, 'r');
$lock = flock($fp_scaled_path, LOCK_SH);
if (!$lock) Warning("Unable to get a read lock on $scaled_path, trying to send anyways.");
ZM\Debug("Sending $scaled_path");
$bytes = readfile($scaled_path);
if ( !$bytes ) {
ZM\Error('No bytes read from '. $scaled_path);
} else {
ZM\Debug("$bytes sent");
}
flock($fp_scaled_path, LOCK_UN);
fclose($fp_scaled_path);
} # end if scaled image doesn't exist or failed sending it
} # end if scaled or not
flock($fp_path, LOCK_UN);
fclose($fp_path);
}
function find_video($path) {
# Look for other mp4s
if (file_exists($path)) {
$files = scandir($path);
foreach ($files as $file) {
if (preg_match('/.mp4$/i', $file)) {
return $file;
}
}
}
}
exit();